Thanks! I've had Connor since he was about 8 weeks old. We got him from the pound. Up until a couple years ago we lived in town and all our neighbors had dogs that he played with (mostly male dogs). There were only two he didn't get along it was the two dogs that no other dogs got along with either, so I don't think it was Connor.
Since we've moved out to the country we don't have neighbors. I always take him everywhere so he meets other dogs still but there not that constant other dog socialization now.
I'll check and how the parents are with other dogs. Thanks!